FFmpeg: libavcodec/smc.c File Reference

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libavcodec

Data Structures | Macros | Functions | Variables

smc.c File Reference

QT SMC Video Decoder by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) For more information about the SMC format, visit: http://www.pcisys.net/~melanson/codecs/. More...

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "libavutil/intreadwrite.h"
#include "avcodec.h"
#include "bytestream.h"
#include "internal.h"

Go to the source code of this file.

Data Structures

struct SmcContext

Macros

#define CPAIR 2

#define CQUAD 4

#define COCTET 8

#define COLORS_PER_TABLE 256

#define GET_BLOCK_COUNT() (opcode & 0x10) ? (1 + bytestream2_get_byte(&s->gb)) : 1 + (opcode & 0x0F);

#define ADVANCE_BLOCK()

Functions

static void smc_decode_stream (SmcContext *s)

static av_cold int smc_decode_init (AVCodecContext *avctx)

static int smc_decode_frame (AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)

static av_cold int smc_decode_end (AVCodecContext *avctx)

Variables

AVCodec ff_smc_decoder

Detailed Description

QT SMC Video Decoder by Mike Melanson (melan.nosp@m.son@.nosp@m.pcisy.nosp@m.s.ne.nosp@m.t) For more information about the SMC format, visit: http://www.pcisys.net/~melanson/codecs/.

The SMC decoder outputs PAL8 colorspace data.

Definition in file smc.c.

Macro Definition Documentation

#define CPAIR 2

Definition at line 40 of file smc.c.

Referenced by smc_decode_stream().

#define CQUAD 4

Definition at line 41 of file smc.c.

Referenced by smc_decode_stream().

#define COCTET 8

Definition at line 42 of file smc.c.

Referenced by smc_decode_stream().

#define COLORS_PER_TABLE 256

Definition at line 44 of file smc.c.

Referenced by smc_decode_stream().

#define GET_BLOCK_COUNT ( ) (opcode & 0x10) ? (1 + bytestream2_get_byte(&s->gb)) : 1 + (opcode & 0x0F);

Definition at line 61 of file smc.c.

Referenced by smc_decode_stream().

#define ADVANCE_BLOCK ( )

Value:

{ \

pixel_ptr += 4; \

if (pixel_ptr >= width) \

{ \

pixel_ptr = 0; \

row_ptr += stride * 4; \

} \

total_blocks--; \

if (total_blocks < 0) \

{ \

av_log(s->avctx, AV_LOG_INFO, "warning: block counter just went negative (this should not happen)\n"); \

return; \

} \

}

Definition at line 64 of file smc.c.

Referenced by smc_decode_stream().

Function Documentation

static void smc_decode_stream ( SmcContext * s )

static

Definition at line 80 of file smc.c.

Referenced by smc_decode_frame().

static av_cold int smc_decode_init ( AVCodecContext * avctx )

static

Definition at line 413 of file smc.c.

static int smc_decode_frame ( AVCodecContext * avctx,

void * data,

int * got_frame,

AVPacket * avpkt

)

static

Definition at line 427 of file smc.c.

static av_cold int smc_decode_end ( AVCodecContext * avctx )

static

Definition at line 457 of file smc.c.

Variable Documentation

AVCodec ff_smc_decoder

Initial value:

= {

.name = "smc",

.long_name = NULL_IF_CONFIG_SMALL("QuickTime Graphics (SMC)"),

.type = AVMEDIA_TYPE_VIDEO,

.id = AV_CODEC_ID_SMC,

.priv_data_size = sizeof(SmcContext),

.init = smc_decode_init,

.close = smc_decode_end,

.decode = smc_decode_frame,

.capabilities = CODEC_CAP_DR1,

}

Definition at line 466 of file smc.c.

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